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1. (WO2018018987) CALIBRATION PRE-PROCESSING METHOD FOR LIGHT FIELD CAMERA

Pub. No.:    WO/2018/018987    International Application No.:    PCT/CN2017/083303
Publication Date: Fri Feb 02 00:59:59 CET 2018 International Filing Date: Sat May 06 01:59:59 CEST 2017
IPC: G06T 7/00
Applicants: SHENZHEN INSTITUTE OF FUTURE MEDIA TECHNOLOGY
深圳市未来媒体技术研究院
GRADUATE SCHOOL AT SHENZHEN, TSINGHUA UNIVERSITY
清华大学深圳研究生院
Inventors: WANG, Haoqian
王好谦
WU, Jvdong
吴驹东
FANG, Lu
方璐
WANG, Xingzheng
王兴政
YANG, Fang
杨芳
ZHANG, Yongbing
张永兵
DAI, Qionghai
戴琼海
Title: CALIBRATION PRE-PROCESSING METHOD FOR LIGHT FIELD CAMERA
Abstract:
The present invention discloses a calibration pre-processing method for a light field camera. The method comprises the following steps: S1: pre-processing a white image to obtain a sub-image under respective micro-lenses; S2: providing a checkerboard grid image and aligning the checkerboard grid image with the white image pre-processed in step S1 to obtain a sub-image under a specified micro-lens; and S3: performing corner detection on each sub-image obtained in step S2. In the processing of the white image, a halo method is firstly used to determine a central point position of a micro-lens, and then the central point position of the micro-lens is optimized by means of linear fitting, utilizing the center point of a sub-image and the central points of surrounding micro-lenses. In the corner detection, Hough line detection is employed, then positions of corners are computed, and the corners are continuously and iteratively optimized by means of a self-defined index, so as to obtain a more precise coordinate position.